Fuse or electrical Problem

Nissan Rogue forum - Includes Nissan Qashqai and Nissan Dualis as well.
RamblinRob
Posts: 3
Joined: Thu Dec 09, 2021 2:48 pm
Car: 2017 Nissan Rogue

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Has anyone had this issue, or similar to it?
About a week ago I noticed that my air conditioner would not blow out cold air. At first, I though maybe the compressor was starting to fail but then I realized that there was never any noise or indication that it switched on. Now Im noticing that the doors do not unlock automatically when put in park nor am I getting the mileage rating (the star rating) each time I drive. Now Im concerned it could be a more electrical issue. I do hope all this is making sense.


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VStar650CL
Technical Expert
Posts: 11931
Joined: Thu Nov 12, 2020 1:25 pm
Car: 2013 Nissan Altima 2.5 SL
2004 Nissan Altima 2.5 S

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The only conceivable thread that could knit those things together is the BCM. A/C Compressor requests are authorized by the BCM before being passed up to the ECM and then IPDM, locking on park or shutdown is directly controlled by the BCM, and an inaccurate battery current reading could cause the alternator to run harder than needed and compromise your gas mileage. BUT (capital but), that assumes they're all really related and that the BCM programming has basically gone cuckoo. The latter is very unlikely. So you should really get the car scanned with a good scanner that can detect all or most of the systems in the car, specifically at least the BCM, HVAC and IPDM in addition to the engine. Short of that, here are a few easy things to check:

1) The A/C compressor is a swash-plate type, so you'll never hear it turn on and off by itself like a cycling-clutch system. Basically, the only time you should hear the clutch cycle on or off is if you push the "AC" button on the HVAC display. If you do hear it when you toggle the button, the compressor isn't your issue. If you don't hear it, there are a lot of things that have to be right for the compressor to turn on, with 4 different devices involved. See this thread for some of them:
post6820102.html

2) The lock/unlock function for the doors is enabled and controlled from the menu in the cluster. There are three options, off (no locking), shift to park, and key-off. It's possible the stored values just got lost or corrupted and now your system is set to Off.

3) Especially if you find that 2 above is true, check your battery connections including all three connections on the ground cable, battery, chassis, transmission (block). Don't trust a visual inspection for the plus terminal, that style of lug can corrode on the inside with little or no evidence on the outside. See this thread for how to perform proper voltage-drop testing:
post6817410.html

datechboss101
Posts: 915
Joined: Sat Jan 14, 2017 12:01 pm
Car: 2016 Nissan Rogue SL -- RIP
2018 Nissan Kicks SR -- RIP
2019 Nissan Rogue SV w/ Prem. Pack
Location: Orlando, FL

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RamblinRob wrote:
Thu Dec 09, 2021 5:12 pm
Has anyone had this issue, or similar to it?
About a week ago I noticed that my air conditioner would not blow out cold air. At first, I though maybe the compressor was starting to fail but then I realized that there was never any noise or indication that it switched on. Now Im noticing that the doors do not unlock automatically when put in park nor am I getting the mileage rating (the star rating) each time I drive. Now Im concerned it could be a more electrical issue. I do hope all this is making sense.
The cold air issue was a common thing with the 98-02 Accords. Back then it was related to a failure within the circuit board of the heater control unit. Not many of us have a soldering iron on hand, so most of us went to the local junkyard for a used unit. Fixed the issue for cheap. Give that a check to see if it's that specific thing; otherwise, use Vstar's suggestion and look at the voltage readings, check the connections (especially grounds) for any looseness or corrosion. Have the Drive belt checked since the A/C system is ran by that belt in conjunction with electrical signals from the BCU.

Did you went through the vehicle's settings in the MID to see if that's disabled or unchecked?

Question. Has your driving habits changed or do you have a lead foot or has your driving habits been consistent since you bought the vehicle? What are your Tire pressures set to?

RamblinRob
Posts: 3
Joined: Thu Dec 09, 2021 2:48 pm
Car: 2017 Nissan Rogue

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Hello everyone
Sorry for late response...working retail this time of year bites.
So, I did check on the door lock setting on the cluster, and sure enough, it was on 'off'. so I changed to 'park' and that is solved.
Still working on tracking the a/c issue. Considering its finally getting a little cooler here in Texas, its not so bad. I didn't think about the drive belt, so will look into that.


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